package com.example;

import java.util.HashMap;

/**
 * Hello world!
 */
public final class App {
    private App() {
    }

    /**
     * Says hello to the world.
     * @param args The arguments of the program.
     */
    public static void main(String[] args) {
        System.out.println("Hello World!");
        HashMap<String, String> map = new HashMap<>();
        map.put("a", "1");
        map.put("b", "2");
        map.put("c", "3");
        map.put("d", "4");

        map.forEach((k, v) -> System.out.println(k + ":" + v));
    }
}
